Lockable suggestion drop box



FIG. 1 is a front, left, perspective view of a lockable suggestion drop box showing our new design;

FIG. 2 is a top view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is bottom view thereof; and,

FIG. 7 is a rear view thereof.

The broken lines in the figures illustrate unclaimed environment and form no part of the claimed design. 

CLAIM The ornamental design for a lockable suggestion drop box, as shown and described. 